From 57a7595a289e80a34f166e66f3cf9191ef772eb3 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Mon, 9 Apr 2018 09:49:44 +0200 Subject: mvebu: drop linux 4.4 and 4.9 support Signed-off-by: Felix Fietkau --- ...The-mvneta_percpu_elect-function-should-b.patch | 68 ---------------------- 1 file changed, 68 deletions(-) delete mode 100644 target/linux/mvebu/patches-4.4/041-net-mvneta-The-mvneta_percpu_elect-function-should-b.patch (limited to 'target/linux/mvebu/patches-4.4/041-net-mvneta-The-mvneta_percpu_elect-function-should-b.patch') diff --git a/target/linux/mvebu/patches-4.4/041-net-mvneta-The-mvneta_percpu_elect-function-should-b.patch b/target/linux/mvebu/patches-4.4/041-net-mvneta-The-mvneta_percpu_elect-function-should-b.patch deleted file mode 100644 index 1d3d6aaf14..0000000000 --- a/target/linux/mvebu/patches-4.4/041-net-mvneta-The-mvneta_percpu_elect-function-should-b.patch +++ /dev/null @@ -1,68 +0,0 @@ -From: Gregory CLEMENT -Date: Thu, 4 Feb 2016 22:09:28 +0100 -Subject: [PATCH] net: mvneta: The mvneta_percpu_elect function should be - atomic - -Electing a CPU must be done in an atomic way: it should be done after or -before the removal/insertion of a CPU and this function is not reentrant. - -During the loop of mvneta_percpu_elect we associates the queues to the -CPUs, if there is a topology change during this loop, then the mapping -between the CPUs and the queues could be wrong. During this loop the -interrupt mask is also updating for each CPUs, It should not be changed -in the same time by other part of the driver. - -This patch adds spinlock to create the needed critical sections. - -Signed-off-by: Gregory CLEMENT -Signed-off-by: David S. Miller ---- - ---- a/drivers/net/ethernet/marvell/mvneta.c -+++ b/drivers/net/ethernet/marvell/mvneta.c -@@ -370,6 +370,10 @@ struct mvneta_port { - struct net_device *dev; - struct notifier_block cpu_notifier; - int rxq_def; -+ /* Protect the access to the percpu interrupt registers, -+ * ensuring that the configuration remains coherent. -+ */ -+ spinlock_t lock; - - /* Core clock */ - struct clk *clk; -@@ -2857,6 +2861,12 @@ static void mvneta_percpu_elect(struct m - { - int elected_cpu = 0, max_cpu, cpu, i = 0; - -+ /* Electing a CPU must be done in an atomic way: it should be -+ * done after or before the removal/insertion of a CPU and -+ * this function is not reentrant. -+ */ -+ spin_lock(&pp->lock); -+ - /* Use the cpu associated to the rxq when it is online, in all - * the other cases, use the cpu 0 which can't be offline. - */ -@@ -2900,6 +2910,7 @@ static void mvneta_percpu_elect(struct m - i++; - - } -+ spin_unlock(&pp->lock); - }; - - static int mvneta_percpu_notifier(struct notifier_block *nfb, -@@ -2954,8 +2965,13 @@ static int mvneta_percpu_notifier(struct - case CPU_DOWN_PREPARE: - case CPU_DOWN_PREPARE_FROZEN: - netif_tx_stop_all_queues(pp->dev); -+ /* Thanks to this lock we are sure that any pending -+ * cpu election is done -+ */ -+ spin_lock(&pp->lock); - /* Mask all ethernet port interrupts */ - on_each_cpu(mvneta_percpu_mask_interrupt, pp, true); -+ spin_unlock(&pp->lock); - - napi_synchronize(&port->napi); - napi_disable(&port->napi); -- cgit v1.2.3